can you please tell me what what is 8 ex 2 + 7 ex 2 -6 ex 2 - 3 ex 2
By "8 ex 2" etc., does ex mean exponent? Is this trying to say 82 ?
IF that is what it means, then
82 + 72 – 62 – 32
64 + 49 – 36 – 9 = 68
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